I'm about to just forget this whole thing and throw a goldfish in a bowl (as they seem to live years that way for me).
I see our other members are helping you with your problems but, as goldfish lover, I feel I have to comment on this.
Please don't keep a goldfish in a bowl again. Just because goldfish can survive in a bowl (they are very, very tough) doesn't mean it's okay to do. Goldfish have just as much right to a properly sized, filtered tank as any other, more expensive fish